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Here's how letters get printed on your keyboard

Jacob Shamsian,Carl MuellerMar 24, 2016, 00:34 IST

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Laser marking uses powerful, focused laser beams to put letters, numbers, punctuation, and other shapes on other materials. Depending on the machine, the lasers can melt, char, or change the other material's chemical composition.

Thanks to Jinan Xintian for sharing this footage.

Story by Jacob Shamsian and editing by Carl Mueller.

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